Shane Lowry and Graeme McDowell are 10 shots off the lead at the RSM Classic after two rounds at Sea Island, Georgia.

The Irish duo are both on four under, after carding a 71 and 68 respectively on Friday which leaves them in a tie for 42nd.

Lowry carded two birdies each on the front and back nines of the Par 70 Seaside course, but bogeys on the fourth, 11th and 17th holes mitigated that momentum.

McDowell managed a bogey free round on the Par 72 Plantation course, picking up two birdies on the 10th and 15th.

But it's American Robert Streb who will take a two-shot lead into the weekend following a flawless second round at the RSM Classic.

LEADERBOARD

Streb picked up nine birdies on the Plantation course at Sea Island on Friday to match his career-low with a 63 which propelled him to the top spot on 14 under ahead of Colombian Camilo Villegas.

Even though the last four winners of the tournament have held the 36-hole lead, Streb said he did not want to get ahead of himself.

"I don't want to be the one that breaks the streak," he said.

"There's still a lot of golf left, still got to go play and we'll see what happens."

After closing out the opening round with a share of the lead, England's Matt Wallace fell back to equal-11th on Friday with a one-under 71.

Starting his round on the back nine, the 30-year-old bogeyed the 12th but looked like he might be able to stay close with the leaders thanks to birdies on the 13th, 14th and 17th.

He struggled to break even on the front nine, picking up just one more birdie on the eighth while bogeying the fifth and ninth.

Wallace's compatriot Tyrrell Hatton improved to equal-30th after carding a four-under 68, while Ian Poulter is also tied for 42nd with Lowry and McDowell.

Luke Donald, Justin Rose and Russell Knox were among those missing the cut.